package com.atguigu.eduservice.entity.excel;

/*
 * @ClassName SubjectExcelListener
 * @author  忘忧君
 * @Description
 * @Version 1.0
 */

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.atguigu.eduservice.entity.EduSubject;
import com.atguigu.eduservice.service.EduSubjectService;
import com.atguigu.servicebase.exceptionhandler.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {

    public EduSubjectService subjectService;

    public SubjectExcelListener() {}
    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if (subjectData == null){
            throw new GuliException(20001, "文件数据为空");
        }

        // 每行层级分类
        EduSubject existOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if (existOneSubject == null){
            // 不含当前一级分类 可以创建
             existOneSubject = new EduSubject();
             existOneSubject.setParentId("0");
             existOneSubject.setTitle(subjectData.getOneSubjectName());
             subjectService.save(existOneSubject);
        }

        String pid = existOneSubject.getId();
        EduSubject existTwoSubject = this.existTwoSubject(subjectService, subjectData.getTwoSubjectName(), pid);
        if (existTwoSubject == null){
            // 不含当前二级分类 可以创建
            existTwoSubject = new EduSubject();
            existTwoSubject.setParentId(pid);
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());
            subjectService.save(existTwoSubject);
        }
    }

    // 判断一级分类是否存在
    private EduSubject existOneSubject(EduSubjectService subjectService, String name){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title", name);
        wrapper.eq("parent_id", 0);
        EduSubject oneSubject = subjectService.getOne(wrapper);
        return oneSubject;
    }

    // 判断二级分类是否存在
    private EduSubject existTwoSubject(EduSubjectService subjectService, String name, String pid){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title", name);
        wrapper.eq("parent_id", pid);
        EduSubject twoSubject = subjectService.getOne(wrapper);
        return twoSubject;
    }
    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
